From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/4] arm: Privileged no-access for LPAE
Date: Wed, 23 Sep 2015 15:24:06 +0100 [thread overview]
Message-ID: <1443018250-22893-1-git-send-email-catalin.marinas@arm.com> (raw)
Hi,
This is the first attempt to add support for privileged no-access on
LPAE-enabled kernels by disabling TTBR0 page table walks. The first
three patches are pretty much refactoring/clean-up without any
functional change. The last patch implements the actual PAN using TTBR0
disabling. Its description also contains the details of how this works.
The patches can be found here:
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 arm32-pan
Tested in different configurations (with and without LPAE, all
VMSPLIT_*, loadable modules) but only under KVM on Juno (ARMv8).
Thanks.
Catalin Marinas (4):
arm: kvm: Move TTBCR_* definitions from kvm_arm.h into
pgtable-3level-hwdef.h
arm: Move asm statements accessing TTBCR into dedicated functions
arm: Reduce the number of #ifdef CONFIG_CPU_SW_DOMAIN_PAN
arm: Implement privileged no-access using TTBR0 page table walks
disabling
arch/arm/Kconfig | 22 ++++++++--
arch/arm/include/asm/assembler.h | 68 +++++++++++++++++++++++++----
arch/arm/include/asm/kvm_arm.h | 17 +-------
arch/arm/include/asm/pgtable-3level-hwdef.h | 26 +++++++++++
arch/arm/include/asm/proc-fns.h | 12 +++++
arch/arm/include/asm/uaccess.h | 53 +++++++++++++++++++---
arch/arm/kvm/init.S | 2 +-
arch/arm/lib/csumpartialcopyuser.S | 20 ++++++++-
arch/arm/mm/fault.c | 10 +++++
arch/arm/mm/mmu.c | 7 ++-
10 files changed, 199 insertions(+), 38 deletions(-)
next reply other threads:[~2015-09-23 14:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-23 14:24 Catalin Marinas [this message]
2015-09-23 14:24 ` [PATCH 1/4] arm: kvm: Move TTBCR_* definitions from kvm_arm.h into pgtable-3level-hwdef.h Catalin Marinas
2015-09-23 14:24 ` [PATCH 2/4] arm: Move asm statements accessing TTBCR into dedicated functions Catalin Marinas
2015-09-23 14:24 ` [PATCH 3/4] arm: Reduce the number of #ifdef CONFIG_CPU_SW_DOMAIN_PAN Catalin Marinas
2015-09-23 14:24 ` [PATCH 4/4] arm: Implement privileged no-access using TTBR0 page table walks disabling Catalin Marinas
2015-12-10 19:40 ` [PATCH 0/4] arm: Privileged no-access for LPAE Kees Cook
2015-12-11 17:21 ` Catalin Marinas
2020-09-28 13:09 ` Orson Zhai
2020-09-28 16:29 ` Catalin Marinas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1443018250-22893-1-git-send-email-catalin.marinas@arm.com \
--to=catalin.marinas@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).